When I look down at my To Do list some days, I notice that maybe a third to a half of my actual assignments are someone else's. I find it sort of funny to think, "have I become that person who? AM I A PAIN?"
It's okay, I've gotten over those feelings, but it hasn't been without some experience to find out that following up with people and holding them accountable for their own work is part of the job in project management.